Method of printing.



J. S. BERGMAN.

METHOD OF PRINTING. APPL|(:AT|0N HLED' FEB. 18.1915.

PatentedSept. 3, 1918..

4" 5'1 f air arts slabs:

amass. f

To all whom it may concern:

Beit known that I, J UsTUs SAMUEL BERG- MAN, a subject of the Kin of Sweden, residing at Stockholm, in t e Kingdom of Sweden, have invented new and useful Improvements in Methods of Printing, of which the following is a specification.

My invention refers to a method of printing according to which the printing means, the stereoptype, or the like, used for the printing acts to press aside the liquid ink or the like applied to the paper or the like in such manner that the impressed portions or spots become free from ink or become only slightly colored, incontrast to theintermediate, unimpressed places, where the ink remains and accumulates when it is forced aside out from the impressed places.

My invention is broadly characterized by that the printing is caused to be effected between rotary rollers and that the ink or the like used for the printing is applied to the paper or the like in a suitable quantity or in a layer of suitable thickness in close proximity to the line on which the rollers press against the paper fed between them. A suitable way of carrying out myfimproved method is to cause the paper or the a like to be fed in a long band between tworotary rollers, of which, one is a printing means and the other a smooth and, preferably, elastic or resilient counter-roller, while the ink or the like is continuously brought along by the paper from a tank above the rollers in an even'layer at the place where the rollers are closest to each other. Thus, at the same or nearly the same moment as the ink from the tank comes into contact with the paper, the ink will be exposed to the pressure and, as it offers no difliculties accurately to control the quantity of ink or the thickness of the layer of ink, and simultaneously, the pressure or the distance between the. rollers, the printing may be rapid and sharp withoutany excess of ink being transmitted to the paper and impairing the printed pattern or design, and on the other hand without any possibility of there being time for the paper to become shown by way 0 damaged by the ink before the printing is efl'ected.-

In the accom anying drawing I have 1 example a suitable means for carrying out my improved method. 7

Two rollers 1 and 2 are rotating against each other, the roller 1 of which is provided 1 M HOD or rmmme.

Specification of Letters ramm- Application ill'eillseb ruar y ls, 1915. Serial No.9,188. x

-, OFFICE imam-s s'rooxnomr', swarm on its surface with raised printing means, while the other roller 2 which preferably is elastic serves as counter-roller. The position and action of the rollers may, however, be reversed, so that the roller 2 serves as printing roller pressing against the back paper. The paper 4 is fed from the roll 5 of Patented Sept. 3, 1918.

paper on to the lower-side of the roller 2 and from there around the same and down between the'rollers 1 and 2 where it is printed. The ink tank 6 is placed above the rollers 1 and 2 and is filled with ink to such an eX- tent that owing to its own pressure the ink will be applied to the paper through a suitable outlet opening 7 in the tank in a layer ofthe proper thickness at or immediately above the line where the rollers press hardest against each other and against the paper fed between them. The ink in the tank is preferably viscid, or often of a pulpy consistency.

In order to produce decorative color shades one or more colors may be applied to the printing side of the paper before it is introduced between the rollers 1 and 2, either over the whole surface of the paper or in spots. The color applied for this purpose should preferably be aS-thin as possible. The drawing illustrates an arrangement for this purpose comprising a roller 8 pressing against the printing side of the paper wound around the roller 2 and transmitting color to the same from the trough 9 in which it is partly submerged. It will be readily understood that for producing different color shades two or more such rollers may be provided, each partly-submerged in a trough containing thin colored ink. These colors-may also be applied to the paper by being sprayed on to the same by face and one having a smooth yielding surface whereby said ink is pressed over said v paper in a definite direction thereby producing a print composed-of characters pronouncedly shaded on one side and bright on the other.

2. The improved process otf printing which consists in feeding ink onto a strip of continuously moving paper and rolling said ink over said paper between an even and an' uneven surface immediately after it has been fed thereon whereby a pronounced shaded print is produced.

3 The improved process, of printing" and immediately thereafter rolling said ink between an even and an uneven surface, over sald paper in a dlrectlon opposlte to its d1rect1on of travel.v

JUSTUS SAMUEL BERGMAN.

Witnesses FREDRIK SoHMrrsE'row, FREDR. NoRmJo. 

